DXP Enterprises

Duff-Norton has been manufacturing Acme and Ball Screws and Nuts for our actuator products for decades Offers an expanded assortment of screws and nuts for your application requirements Acme Screws & Nuts offer excellent load ratings and Centralizing class screw & nut assemblies Ball Screws & Nuts offer excellent load ratings, 90% efficiency, and long predictable life ratings

Duff-Norton offers a complete line of both standard and custom engineered machine screw actuators for applications up to 350 tons. Machine screw actuators offer positive mechanical action, precise positioning, and uniform lifting speeds. Standard configurations include upright or inverted units with translating or rotating lifting screws, and top plate, threaded, or clevis ends. Precise Positioning - can be controlled accurately for positioning within thousandths of one inch Self Locking - models featuring higher gear ratios are inherently load holding as long as the actuator is not subject to vibration Uniform Lifting Speeds - since many actuators feature the same gear ratios different capacities can be used in the same application to lift unevenly distributed loads with uniform speeds Quick, Sure Operation - All actuators are designed and built to be positive acting, for accurate response to motive power

Anti-backlash actuators reduce vertical backlash resulting in smooth, precise operation and minimal wear. Backlash occurs when the motor driving an actuator reverses its load direction. Since there is a gap between the lifting screw and the worm gear threads detrimental screw movement may occur. When the actuator is under load, the lifting screws threads are supported by the worm gears threads. The anti-backlash nut, being pinned by to the worm gear and being adjusted downwards by the shell cap, forces the bottom thread surfaces against the upper thread surfaces of the lifting screw. Thus backlash between the lifting screw and worm gear threads is reduced to a minimum. The Duff Norton Anti-backlash design features a separate anti-backlash nut and reduces actuator backlash to less than 1 thousandths Available in Stainless Steel Anti-backlash nuts reduce worm gear wear Anti-backlash nuts act as additional load safety devices when the worm gear has become worn

Allows for extremely fine adjustment. Corrosion-resistant. Equipped with anti-backlash nuts to minimize vertical backlash between the screw and worm gear nut. Actuates up to 1, 000 pounds. Also available in stainless steel. Standard model has anodized aluminum shell cap and housing with stainless steel worm and lifting screws. Also available with sealed 316 stainless steel shell cap, housing, worm and lifting screw. Manual operation is accomplished with an easy-to-use hand knob. The dial indicator is protected by a removable clear plastic cover.

A screw jack is a device used to apply a force, push and pull, or move to a position and hold by mechanically converting rotary motion into linear motion Screw jacks (mechanical actuators) capacities from 14 ton to 350 tons Available in machine screw, ball screw, stainless steel machine screw actuators, micro-miniature actuators, high duty cycle actuators, motorized machine screw and ball screw actuators, electric cylinders and motor control systems Accessories include miter gear boxes, c-face motor adapters, limit switches, transducers, visual and digital position indicators, couplings, ball screws and ball screw systems, and locking rings Can be used as alternatives to hydraulic and pneumatic systems

Duff-Norton manufactures linear actuators and electric cylinders Linear Actuator products include TracMaster and LinearMaster Actuators, Modular Actuators and Electric Cylinders Linear actuators are available in capacities ranging from 27 pounds to 25 Tons, gear or belt driven, acme screw and ball screw systems with various AC and DC input voltages Duff-Norton Linear Actuators are specially designed for a variety of commercial and industrial applications These actuators are used for opening and closing, tilting and pivoting, lifting and lowering and positioning Custom designs are also available for special applications Linear Actuators are now being used in place of pneumatics and hydraulics when leaking hydraulic oil is a concern